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巨大的宇宙云的存在，实际上是使二十年代首创的大爆炸论得以保持其宇宙起源论的主导地位所必不可少的。[精解] The exi......

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For this part, you are allowed 35 minutes to write an open letter on behalf of the Students’ Union, asking people to give help to a student who is seriously ill. You should write at least 150 words following the outline given below:(1)表示已经收到父母的来信；(2)问候父母并提醒其注意健康；(3)简单介绍你的近况。
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宇宙膨胀说虽然听似奇特，但它是基本粒子物理学中一些公认的理论在科学上看来可信的推论。许多天体物理学家七、八年来一直认为这一论说是正确的。[精解] Odd though it sounds，cosmic inflation is a scientifically plausible consequence of some respected ideas in elementary-particle physics，and many astrophysicists have been convinced for the better part of a decade that it is true．句子分析：一、句子可以拆分为三段：Odd though it sounds， cosmic inflation is a scientifically plausible consequence of some respected ideas in elementary-particle physics， and many astrophysicists have been convinced for the better part of a decade that it is true．二、句子的结构：1)主干结构是倒装的让步状语从句+主句。Odd though it sounds=though it sounds odd2)consequence 前后有多重定语。3)and many astrophysicists have been convinced 为被动结构。4)that it is true 是宾语从句。三、词的处理：cosmic inflation 宇宙膨胀说；scientifically plausible consequence 科学上可信的推论；in elementary-particle physics 基本粒子物理学；convinced 被说服，相信；for the better part of a decade 七、八年来；
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